Improvement in railway-car brakes



Patented m 23, 1872.

on O Y A N .W

Improvement in Railway-Car Brakes.

44 PIW TO-LITHOGWAPHIC OQMX/USBORNEI? PROCESS) W traction) andtoggle-joint links, the brake be- WILLIAM NAYLOEOF MILDMAY PARK,ENGLAND.

IMPROVEMENT IN RAlLWAY-CAR BRAKES.

Specification forming part of lletters Patent N 0. 129,855, dated July23, 1872.

SPECIFICATION.

I,W1LLIAM NAYLOR, of Mildmay Park, in the county of Middlesex, England,engineer, have invented Improvements in Bailway- Brakes andin apparatusconnected th erewith, of which the following is a specification:

This invention relates to a peculiar arran gement of brakes forrailway-wagons.

The accompanying drawing represents my improved brake, which is broughtinto action by the application of a spring(acting by coning lifted offby the brakemau and held off until released also by the hand ofthebrakeman. 1

On the end of the brake-lever D there is a pulley, E, under which ashort length of lifting-chain, G, is passed, one end of such chain beingsecured to the framing at .9, while the other passes onto and is securedto a windlass, h, carrying a brake-wheel, t, round which a brake-strapis passed, connected to a weighted tipping-lever, u. The brake-lever Dis lifted by turning the windlass by means of a handle for the purpose,and is maintained elevated, as shown, by the friction of the brakestrap.When the brake is to be applied the brakeman, as he passes along thewagons, merely throws over the tipping-levers u to the positionindicated by the dotted line, whereupon, the windlass-barrels beingreleased, the springs M and toggle-joint links H H will operate upon ordepress the brake-levers D of the several wagons, or some of them, andthrough the ar-, rangement of levers and rods shown in the drawing willapply two brake blocks, S S, simultaneously to the two wheels on eachside of a wagon. In orderto check the too sudden descent of thebrake-lever D, I connect it with a plunger or piston working in acylinder, 0-, containing liquid, which is slowly displaced by thedescent of the piston, while it nevertheless admits of the piston risingagain freely when the brake-lever is to be lifted. This result may beobtained by having a valve at the bottom of the cylinder opening inward,suchvalve having, moreover, a small additional opening made therein, sothat on lifting the plunger the liquid, which may be contained in ajacket surrounding the cylinder, enters freely through the entirethoroughfare of the valve; but when the plunger descends the valveinstantly closes and permits the liquid to pass only through the smallopening made in such valve, and thus controls the descent of thebrake-lever.

Having now described my invention, I would observe that what I claimis-- 1. The combination, with a brake-lever, of a piston or plungerworking in a cylinder containing air or liquid, and operatingsubstantially as hereinbefore described.

2. The weighted tipping-lever u, in combination with the brake-strap,windlass h, and rope or chain for holding out of action a carbrake,substantially as hereinbefore described, and illustrated by the drawing.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

WM. NAYLOR.

Witnesses:

WM. LEYSTER HOLT,

7 Great Manchester street buildings,

London. FRED. WALKER,

47 Lincolns Inn Fields, London.

ATENT OFFICE.

